. Author manuscript; available in PMC: 2018 Jan 1.

Published in final edited form as: Addict Biol. 2015 Sep 18;22(1):152–162. doi: 10.1111/adb.12313

Table 1.

Mean (±SEM) number of responses and infusions per 1 h session during baseline self-administration prior to initiating treatments.

	Treatment Group	Active	Inactive	Infusions
Experiment 1	EXT + EE	320.6 ± 34.4	50.6 ± 12.7	20.5 ± 0.9
Experiment 1	EXT + NoEE	280.3 ± 18.7	31.7 ± 6.1	19.8 ± 0.5

Experiment 2	NoEXT + EE	292.1 ± 46.5	31.0 ± 13.7	20.2 ± 0.9
Experiment 2	NoEXT + NoEE	277.3 ± 32.8	36.7 ± 11.1	19.0 ± 0.9

Experiment 4	EE 24 h Before EXT	320.6 ± 68.0	40.6 ± 18.6	19.5 ± 1.4
Experiment 4	EE Immediately After EXT	284.6 ± 56.9	70.0 ± 20.7	20.1 ± 1.0

Experiment 5	EE 4 h Before EXT	230.6 ± 30.3	39.4 ± 12.0	18.4 ± 0.8
Experiment 5	EE 6 h After EXT	288.7 ± 42.2	18.0 ± 5.2	20.0 ± 0.7